(bug 57042) Update $wgUploadNavigationUrl on tewiki

This patch changes $wgUploadNavigationUrl to point
to a localized File Upload Wizard on the Telugu
Wikipedia per community consensus; see bug for
URL with on-wiki agreement for the change.

Bug: 57042
Change-Id: Ic7b6a109209c49db852d3b763385ae7e6b4055d0